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Need Math Help Keyboard not working 

 Jan 21, 2019
 #1
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+1

First one:

Take square root of both sides of the equation to get

x^2 - 82 = = 18  or  -18

 

x^2 =  100    or   64

x= + or - 10    or  + - 8        -10,-8,8,10

 

 

Second one

 

x^2+6x-16=0  factor

(x-2)(x+8) = 0                   so x = 2 or -8       -8 is the smallest

 

 

Third one

 (x+6)^2 = -25

x+6 =    -5i     5i 

x = -6-5i     -6+5i

 Jan 22, 2019

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